在以高温高压火电厂为主的电力系统中，自动低频减载装置的末级动作频率一般为()。
在励磁调节器中，移相触发单元的作用是将()的控制信号转换成触发脉冲的。
下列各元件中，一般作主选相元件的是()
会引起电力系统频率降低的操作是()
自动低频减负荷装置的作用是保证电力系统安全稳定运行和()。
虚有差调频法具有的特点是()
电力系统的有功功率电源是()
发电机调差特性平移的目的是()。
准同期并列的实际条件中，对频率差的要求是不大于()。
输电线路的正序阻抗与负序阻抗相比，其值要()
利用等面积定则分析简单系统的暂态稳定性，当最大可能的减速面积小于加速面积，则系统将()
当zzq-5自动准同步装置的出口电路发出加速脉冲时，同时闭锁了()
电力系统的综合供电负荷加上厂用电之和，称为()
电力系统中发生概率最多的短路故障是()
待并发电机组作适当调整以符合并列条件后通过()合闸作并列运行。
电力系统有功负荷最优分配的原则是()
用牛顿-拉夫逊法进行潮流迭代计算，修正方程求解的是()。
具有正调差特性的同步发电机，当输出的无功电流增大时，机端电压()
顺调压是指()
标签与标签的区别，正确的是()。
跳转菜单可包含3个基本部分，其中()是必需的，其他两部分则是可选的。
标签属于哪类标签()。
下列哪个选项的css语法是正确的?()
css语法的标识符是()。
以下所列的()面板不属于控制面板。
以下哪个不属于javascript的事件驱动的事件()。
在html页面中，包含id为“1”的层，下列选项中的javascript代码可以使该层显示。()
如果要检查目标浏览器的兼容性，应选择“文件”|“检查页”子菜单中的()命令。
以下说确的是()
为某文档设置背景图像，但图像无法覆盖整个文档，想设置一个图像重复出现的效果，应选择下列()选项。
在框架名称中允许使用()。
在css语言中下列哪一项是左边框的语法?()
以下描述超链接的特征是错误的是()。
如何求得 2 和 4 中最大的数?()
css是利用html的()标记构建网页布局
如何调用名为"myfunction"的函数?()
如何改变某个元素的文本颜色?()
what is the nickname of mount huashan?
what made mount hengshan (shanxi) a place of strategic importance in history?
which mountain should you go if you want to visit the shaolin temple?
in which part of the yangtze river are the three gorges located?
which one is used in the chinese saying, “never give up until one reaches the _________”?
who succeeded in having the great wall joined together?
which was not true according to the story of meng jiangnv?
what is the liangzhu culture famous for?
what is said about the gongchen bridge?
what project was launched in hangzhou to monitor the traffic in real time?
which academy is not located in mount hengshan (hunan)?
why is the yellow river “yellow”?
which parts of the great wall were used for command posts and logistics?
which city is entitled as ‘oriental leisure city’ according to the video?
which ceremony is held at the confucius temple in qufu every year?
what are the core concepts of confuciani?
what is the book compiled to record the words and ideas of confucius?
what is the forerunner of the compass?
who was deemed as the oriental leonardo da vinci?
what are the two things seen as the basis and predecessor of printing?
who had named the old trade route as "the silk road"?
compared with columbus' ship, what was zheng he's ship like?
what is the full name of the belt and road or the belt and road initiative?
when was the belt and road initiative proposed?
丝绸之路是古代最著名的贸易路线。它从长安一直延伸到印度、罗马等。丝绸之路不仅仅是古代国际贸易路线，更是连接亚洲、非洲、欧洲的文化桥梁。如今，丝绸之路从遥远的古代延伸到了现代。“一带一路”是“丝绸之路经济带”和“21世纪海上丝绸之路”的简称。一带一路旨在借用古代丝绸之路的历史符号，积极发展与沿线的经济k8凯发的合作伙伴关系，共同打造政治互信、经济融合、文化包容的利益共同体、命运共同体和责任共同体。
what are the three worldwide architectural systems?
which of the following is not the feature of ancient chinese architecture?
which poem does the idiom “gouxindoujiao” originate from?
what is the main entrance to the forbidden city?
what is the outer court composed of?
what color is the roof of wenyuan ge?
which is called the "mother of chinese gardens"?
which garden became famous after the poem written by ouyang xiu?
which is the tallest building in china currently?
which of the following is not true about the famous modern chinese architecture?
what was the original reason to set off fireworks?
what is not mentioned in the poem new year’s day by wang anshi?
which of the following is not a traditional moon worshiping activity?
moon cakes are made round in shape to symbolize _____.
which poet has written a poem missing his brother on mid-autumn festival?
which of the following descriptions of dragon-boat race is incorrect?
why do children wear bracelets with five-color threads on dragon boat festival?
which festival is not incorporated into the celebration of qingming festival?
which food is mentioned as a typical food on qingming festival?
which of the following is not a popular activity on qingming festival?
what are the proper classifications of taste?
what cuisine does mapo tofu belong to?
what cuisine does roasted pork intestine belong to?
what is mautai generally labeled as?
why did du kang make liquor?
who’s the creator of the line “to drown your sorrows in drink only creates more”?
what category does yunan pu’er fall into?
what is said about the tea horse road?
when whole fish or chicken is served, which part of the dish is usually put towards the most honorable guest?
who is usually seated facing the door of entry?
which of the following is incorrect about laosheng roles?
which role is the traditional chinese ideal of a beautiful woman?
in peking opera, characters with red faces are usually _____.
which type of calligraphy is characterized by “silkworm’s head and swallow’s tail” ?
which statement is true about wang xizhi?
which of the following is not mentioned as a reason why calligraphy is still popular today?
in which dynasty did figure painting see its heyday?
chinese painting includes the following themes except _____.
which of the following is not true about paper-cut?
which of the following is not true about shadow puppeteers?
what is duǎn hè（短褐）made of ?
what color did the officers wear in the han dynasty in the spring?
which minority’s clothing does cheongsam originate from?
when was the golden age of cheongsam?
what kind of suit does zhongshan suit belong to?
what dress was zhongshan suit designed to substitute?
what do the brush-stand covers of the chest pockets symbolize?
what was the most fashionable clothing in the 1960s?
what is the earliest known written record of chinese medicine?
in romance of the three kingdoms, who is the doctor scraping poison off the bone of guan yu?
when were two life-sized bronze acupuncture statues cast？
who is known as a doctor who could bring the dead back to life?
who is titled as china's king of medicine?
what is the key herbal medicine to help tu youyou and her team find the cure for malaria?
whose book has given tu youyou the inspiration to cure malaria?
can you list some health preserving methods to prevent disease?
when was tcm included in the who international classification of diseases for the first time?
what’s the name of the summit of mount taishan?
what’s the original source of the yangtze river?
when was the present great wall mainly completed?
what is the liangzhu culture noted for?
what kind of invention did bi sheng make?
who had played a key role in exploring the trade route between east and west in the western han dynasty?
which of the following is true about the maritime silk road?
when has chinese architecture had a major influence on the architectural styles of korea, vietnam, and japan?
which gardens in suzhou are included in the “four famous gardens” in china?
which of the following is true about shanghai tower?
which palace doesn’t belong to the five grand palaces of the world?
which of the following is a popular activity on mid-autumn festival?
scholars generally believe that dragon boat festival originated in old __________.
in traditional chinese culture, people commemorate the dead on qingming festival by _____.
which of the following is not mentioned about traditional spring festival couplets?
who is said to have discovered tea?
which is not a distilled spirits?
what should you do when clinking with other diners?
what cuisine represents the southern chinese dishes?
which of the following stories is not related to wang xizhi?
which of the following is not true about chinese painting?
paper-cut uses the following tools except_____.
what is the most distinctive feature of cheongsam?
which of the following is not the feature of hanfu?
which of the following is not true about chinese fashion in the 21st century?
who is the author of the compendium of materia medica?
who is the doctor to make chinese anesthetic drug, mafisan?
when was tu youyou awarded the nobel prize for physiology or medicine?
in couplets we often read “may your fortune be as boundless as the eastern seas and your life be as long as the long-lasting_______________ mountains”.
flowing to the lower reaches, the yellow river develops into a “____________ river” where the riverbed is actually higher than the surrounding land.
the great wall functioned as an extremely powerful _________ system warding off the invasions from nomadic tribes in the north.
confucius is commonly known as “role model for________ through the ages”.
xuanzang had made huge contributions to the prosperity of the spread of________ in the tang dynasty.
the belt and road _________ can also be called “the belt and road”.
during ancient chinese architecture’s long-standing development, _________ is the most significant architecture feature and wisdom of chinese craften.
besides emperors and empresses, the top _____ examinees of the annual final imperial exams walked through the meridian gate.
in addition to six towering trees with more than 100 years old, 108 decorative openwork __________ are famous within surging waves pavilion.
some people eat tangyuan on near year’s eve as it symbolizes _____
qu yuan was in despair and drowned himself in _____ river.
color, aroma and _________ are three essential considerations of chinese cuisine.
unlike black tea, dark tea or oolong tea, green tea is not __________ at all.
the four anhui opera troupes come to beijing in 1790 for the birthday of emperor _____.
the block-printed chinese new year pictures originated from _______ in ancient china.
in the han dynasty, shenyi means wrapping the body deep within the clothes, and ________is one of the daily clothes worn by women.
in treatment practices of tcm, _________ has been listed as the intangible cultural heritage of humanity by unesco.
among the four diagnostic methods, _________is the essence of traditional chinese medicine.
_________ is titled as china's king of medicine.
visual foxpro的报表文件.frx中保存的是()。
表达式stuff("goodboy",5,3,"girl")的运算结果是()。
下列函数中函数值为字符型的是()。
以下所列各项属于命令按钮事件的是()。
弹出式菜单可以分组，插入分组线的方法是在"菜单名称"项中输入什么字符()。
在sql语句中，与表达式"仓库号not in("wh1","wh2")"功能相同的表达式是()。
对关系s和关系r进行运算，结果中既包含s中元组也包含r中元组，这种运算称为()。
查询设计器和视图设计器的主要不同表现在于()。
sql的数据操作语句不包括()。
通过指定字段的数据类型和宽度来限制该字段的取值范围，这属于数据完整性中的()。
如果要在屏幕上直接看到查询结果，"查询去向"可以选择()。
结构化程序中对“过程”正确的有()。
关于程序(命令)文件，下列说确的有()。
要满足下列哪些条件的二维表才是关系()。
visual foxpro中使用了()等几种变量形式。
对多个表和视图进行查询，可以使用()。
以下属于结构复合索引文件特点的有()。
视图有哪些优点?()
在比较过程中，关系运算符两边数据的数据类型可以不一致，但不能有空格。()
对索引标识由不超过10个字符构成，是由系统指定的。()
如果用多个数值型字段直接相加建立索引表达式，索引将按照字段值的和而不是按字段值本身对记录排序。()
查询和视图都可以帮用户从数据中获得所需信息。()
结构化程序设计中的清屏语句为clear，具有运行指定的命令文件。()
命令动词后的子句位置可交换。()
在命令窗口中用private命令说明的变量均为局部变量。()
索引关键是建立索引的依据，索引文件按关键字从大到小排列记录。()
一个数据库表设置了主索引后，当把它移出数据库时，已设置的主索引将自动消失。()
()是网络通讯中标志通讯各方身份信息的一系列数据，提供一种在internet上验证身份的方式。
以下关于internet远程登录服务的作用，说法不正确的是()。
统一资源定位器(url)的作用在于()。
以下哪种不属于用户接入internet的方法()。
正确的url格式为()。
数字时间戳是一个经加密后形成的凭证文档，它包含三个部分，以下不属于其所包含的部分的是：()。
网络中的认证包括身份认证和()。
电子商务交易的特点不包括以下哪一项()。
在html语言中，当浏览器无法显示图片时，要显示该图片的相关属性可以使用标记()。
电子商务的概念模型可以抽象地描述为每个ec实体和()之间的交易事务关系。
网上交易的安全性是由()来保证的。
关于数据仓库种的数据随时间变化的特性表现，以下说法不正确的是()。
下面哪个术语不属于电子商务的范畴()。
()是指不同厂家生产的计算机在硬件或软件方面的不同。
数字证书采用公钥体制，即利用一对互相匹配的密钥进行()。
企业间网络交易是电子商务的哪一种基本形式()。
10base5中的5代表每一区段最大传输距离为()。
()允许不同主机之间采用tcp/ip协议进行通信，是电子商务得以普及、繁荣的重要基础设施。
下列各功能中，internet没有提供的是()。
全球资源定位器简写为()。
浏览web网站必须使用浏览器，目前常用的浏览器是()。
以下关于html注释的说法错误的是()。
在edi所包含的内容中，edi应用的基础是()。
目前我国智能卡的推广应用中还存在一些障碍，主要是安全问题和()。
ssl协议属于网络协议的()。
set协议涉及的对象不包括()。
关于数字证书的原理说确的是()。
定义表格使用的标记符为()。
php是一种服务器端脚本语言，以下哪一个不是它的特点()。
在公开密钥密码体制中，加密密钥即()。
大部分企业没有使用传统的edi的主要原因在于下面哪些因素()。
防火墙有哪些作用()。
从技术的角度上看，电子商务的应用系统的组成部分包括()。
为了提高安全性，在防火墙和企业内部网之间一般会有一台代理服务器，该服务器的功能是()。
xdsl的应用范围包括()
网站的凯发官网入口主页(homepage)通常表示为()。
atm能同时满足数据、语音、影像、多媒体登数据传输的需求，主要因为atm具有以下技术优点()。
目前使用的防火墙产品的类型()。
构成edi系统的要素包括()。
组成局域网的设备，根据其作用不同，可以分为()。
粒度问题是设计数据仓库的一个最重要方面，细化程度越高，粒度级就越大;相反，细化程度越低，粒度级就越小。()
adsl的下行速度小于上行速度，非常符合普通用户联网的实际需要。()
匿名ftp服务器通常允许用户上传文件。()
网络地址的长度决定每个网络能容纳多少台主机，主机地址的长度决定整个网间网能包含多少个网络。()
由的visa和microsoft等联合制定了安全电子交易协议，得到了大多数厂商的认可和支持，为网络上电子商务的开发提供了一个关键的安全环境。()
公钥加密体制，这种体制的加密密钥和解密密钥不相同，而且从其中一个很难推出另一个，这样加密密钥可以公开，而解密密钥可以由用户自己秘密保存，其典型代表是rsa。()
搜索引擎的工作原理就是搜集、索引、排序。()
通常网络软件包括网络协议和协议软件，网络通信软件，网络操作系统，网络管理及网络应用软件。()
电子商务发展的核心和关键问题是交易的安全性。()
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